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To grid or not to grid

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To grid or not to grid

  1. 1. To Grid or not to Grid? Andrew Zolnai zolnai.ca Geocomm 2017 Wikimedia and andretchaikowsky.com
  2. 2. Scalable grids Proto-GIS (1988) DB2 Spatial (2006) bit.ly/2xA7q5H
  3. 3. Tesselation grids Geodyssey (1992) Pyxis (current) what3words bit.ly/2xWXXX5 bit.ly/2xk29iR map.what3words.com
  4. 4. NADM (2002) Cordilleran geology Spatial object models on.doi.gov/2wbdv4S arcg.is/2waqrYI
  5. 5. Non spatial addressing Postal address clean-up bit.ly/2waZ0y1 bit.ly/2pyNGri
  6. 6. Open standards bit.ly/2fF9a3O One of the core contributions of a DGGS is geospatial data fusion on demand. In a multiple provider environment, fusion is only possible with an information system architecture based upon open standards. The OGC DGGS Abstract Specification provides a platform to enable interoperability within and between different DGGS implementations while promoting reusability, knowledge exchange, and choices in the design of individual DGGS implementations. ow.ly/JeXK30g5EHW
  7. 7. When is a map not a map? “Real-time mapping without the drift” bit.ly/1Y8M2bi
  8. 8. Or when is a map not possible? Former Soviet Union, West Siberia 2002 Bearing Distance deg min sec m 2 30 0 2000 358 20 0 5500 5 10 0 22500 7 30 0 2000 355 40 0 1500 272 30 0 4000 281 10 0 6000 268 30 0 6500 180 0 0 7500
  9. 9. Modern geolocationAre coordinates, projection, datum etc. always à-propos? Are there better frameworks for real-time crowd-mapping? Do robotics ‘think’ or work in Cartesian space? Are base 2 or 10 the best there is? How about ‘good enough’ or ‘close enough’ computation? Bonus Tales from the geodetic crypt bit.ly/2xlBh1Y
  10. 10. Thank you! Questions? Andrew Zolnai @azolnai

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